Daniel Ricciardo's Red Bull overhauled Valtteri after stopping for fresh Soft tyres during the Safety Car - a call that, with hindsight, Toto admits was the right one.
"We thought at the time that track position would be more beneficial," he said. "You could see that in the first stint there was no overtaking and Lewis was on Mediums at that stage, barely 10 laps old.
"Our calculation predicted the Medium would last to the end and putting a new Soft we thought wouldn't give you such a performance advantage. It was much more than we expected.
"Now, looking back, it wasn't the right strategy. It would have been the right strategy to go with the second Soft. Nobody in the team including myself thought it was the right thing to do.
"The Ferraris and Mercedes decided for the same strategy, we stayed out. I don't think it was a matter of focus, it was a matter of the quickest race. That's what our simulations showed.
"Red Bull made a bold call in pitting them both for Softs. It was interesting to do and it proved to be 100% spot on."